/**
 * The MIT License
 * 
 * Copyright (c) 2008, 2009 @Author(s)
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package integrationtestclasses.stack;

import java.util.Vector;

/**
 *  @author Per Otto Bergum Christensen
 */
public class Stack<E> extends Vector<E> {

	private static final long serialVersionUID = 1L;

	public void push(E item) {
		if (null == item) {
			throw new IllegalArgumentException("item is null");
		}
		addElement(item);
	}

	public synchronized E pop() {
		E item = peek();
		remove(size() - 1);
		return item;
	}

	public E peek() {
		if (isEmpty()) {
			throw new IllegalStateException("Stack is empty");
		}
		E item = get(size() - 1);
		return item;
	}
}
